WO2016150617A1

WO2016150617A1 - Forming tool and method for optimizing board forming in a forming tool

Info

Publication number: WO2016150617A1
Application number: PCT/EP2016/053025
Authority: WO
Inventors: Tobias Bäume; Artur ERFURT; Jens KAPPEY; Alexander Matveev
Original assignee: Volkswagen Aktiengesellschaft
Priority date: 2015-03-25
Filing date: 2016-02-12
Publication date: 2016-09-29
Also published as: EP3274110B1; DE102015205468A1; CN107427886B; EP3274110A1; CN107427886A

Abstract

Forming tool and method for optimizing board forming in a forming tool. The forming tool (1) has two tool parts, which are movable relative to one another in a working direction, for holding and forming a board therebetween in order to form a formed part (UT) therefrom, a plurality of position adapters (10.1-10.8) for contacting a peripheral edge (PL1) of the board in order to position the latter transversely to the working direction, wherein the position adapters each have an actuator (11) via which a board-contacting element (12) of the position adapter is displaceable in order to position the board transversely to the working direction, a sensor arrangement (20) which is set up to sense at least one characteristic (a1.1-a4.1) corresponding to each position adapter, said characteristic (a1.1-a4.1) correlating with a shape-change distribution in the formed part, and a control device which is connected to the actuators and the sensor arrangement and is set up to actuate the actuators, on the basis of the sensed characteristics, to displace the board-contacting elements such that a predetermined nominal shape-change distribution is achieved on the formed-part side.

Description

description

Forming tool and method of optimization

a blank forming in a forming tool

The invention relates to a forming tool as defined in the preamble of claim 1 and a method as defined in the preamble of claim 6 for optimizing a blank forming in a forming tool.

A forming tool and a method of the type mentioned above are each off

DE 10 201 1 102 519 A1. The forming tool known therefrom comprises a plurality of projecting in the direction of an upper tool part Einweiser, each of which is formed with a tapered surface on which a peripheral edge of the board in the forming tool can slide off to transverse to a vertical direction of a horizontal orientation of the board relative to allow the forming tool. Some of the referrers are movable by means of actuators transversely to the working direction to press against the peripheral edge of a board to be positioned and thereby push the board against preset, fixed Einweiser of the multiple Einweiser, whereby a positioning of the board relative to the forming tool is brought about.

A sensor arrangement of the forming tool described in DE 10 201 1 102 519 A1 is set up to detect at least one parameter related to the forming of the board. More specifically, the sensor assembly has at least one sensor for detecting the position of a board stored in the forming tool to detect the correct orientation of the board, with the aim to release the closing of the forming tool or a press stroke only when the board is aligned correctly is.

As a result, in the case of the forming tool described in DE 10 201 1 102 519 A1, the board position or board positioning is predetermined transversely to the working direction by the preset, fixed instructors. The sensor arrangement serves only to confirm the positioning of the board in the preset position. The presetting of the board positioning is usually carried out only in a training phase of the forming tool and usually takes place by experience knowledge manually by adjusting the Einweiser to be fixed in order to find an optimal operating point for the forming of the board. The optimum operating point is defined, for example, by a plate-related deformation change in the forming part that is as constant as possible, with the circuit board position in the forming tool (transversely to the working direction) has a significant influence on the deformation distribution on the forming part.

In a production phase, the preset, fixed referrers are no longer adjusted in such a conventional forming tool. Therefore, if caused by e.g. Material differences, different board thicknesses, and / or different lubrication conditions, process variations during forming occur, to maintain the optimum operating point, usually press parameters (e.g., die cushion pressures) and board holder spacing have changed. Thus, the optimum operating point remains quantitatively undefined, with changes in press parameters and sheet spacing, typically in the production phase, usually being empirical, which is very time consuming and does not guarantee that the optimum operating point will be accurately achieved. As a result, the blank forming in such forming tools can only be optimized to an optimum operating point to a limited extent.

The invention is therefore based on the object, as defined in the preamble of claim 1 forming tool as well as a defined according to the preamble of claim 6 process so that an improved optimization of the board forming is made possible to an optimal operating point.

This is achieved with respect to the forming tool having the features in the characterizing part of claim 1 and achieved with respect to the method with the method steps in the characterizing part of claim 6. Further developments of the invention are defined in the respective dependent claims.

According to the invention, a forming tool has two tool parts, a plurality of adjustable directors and a sensor arrangement. The two tool parts are relative to each other in a direction of movement relatively movable and provided and set up for receiving and forming a circuit board in between, to form from this a forming part. The directors are provided and arranged to contact a peripheral edge of the board to position them transversely to the working direction between the two tool parts. The instructors each have an actuator, via which a Platinenkontaktierungselement the respective instructor for positioning the board is transversely movable to the working direction. The sensor arrangement is provided and arranged for detecting at least one parameter associated with the forming of the board. The forming tool according to the invention is characterized in that the sensor arrangement is set up to detect at least one parameter corresponding to each instructor, which correlates with a board-related deformation change in the forming part, ie describes or maps the respective operating point. In addition, a control device is provided which is connected to the respective actuators of the instructors and to the sensor arrangement and which is set up to actuate the actuators on the basis of the detected characteristic values for moving the printed circuit board contacting elements in such a way that a predetermined nominal deformation change distribution is achieved on the partial mold side.

The invention is based on the basic idea that, as explained above, the optimum operating point of a blank forming can be defined by a plate-related deformation change in the forming part that is as constant as possible, the blank layer in the forming tool (transversely to the working direction) having a significant influence on the shape change distribution on the forming part. Due to the fact that, according to the invention, at least one characteristic value correlating with the board-related deformation change distribution in the deformation part can be detected corresponding to each referrer, this can be quantified. These characteristic values, which describe or represent the respective operating point, are then advantageously used according to the invention in order to adapt the board positioning or board position by means of the adjustable instructors in order to achieve a transformation part-side desired deformation distribution. The desired deformation distribution can advantageously represent a predetermined optimum operating point for the plate forming. As a result, improved PCB board reshaping optimization to the optimum operating point is thus enabled.

It is advantageous to automate the maintenance of the optimum operating point with the forming tool according to the invention, the control automatically reacting to process fluctuations and compensating for them with minimal expenditure of time and without manual empirical adjustment.

According to one embodiment of the invention, the forming tool is designed as a deep-drawing tool. On thermoforming tools, the above-mentioned relationships of optimum operating point, platinum-related deformation distribution and board positioning or board position in the forming tool can be used particularly suitably and advantageously for optimizing the sheet forming. Preferably, the forming tool is designed as Blechumformwerkzeug. In accordance with a further embodiment of the forming tool according to the invention, the control device is set up to compare the characteristic values corresponding to the respective referrers with an associated predetermined setpoint value, respectively to determine a deviation of the characteristic value from the setpoint, to set respective manipulated values for the actuators for the control units on the basis of the respective deviations To compensate compensate for the deviation and to control the actuators each based on the manipulated variables for moving the Platinungskontaktierungs- elements.

In other words, the deformation-desired setpoint shape distribution is advantageously quantified here by the predetermined setpoint values, so that the optimization of the sheet forming to the optimum operating point can be realized in a simple manner by a controlled system in which the characteristic values are adjusted to the nominal values by minimizing the deviation ,

According to yet another embodiment of the forming tool according to the invention, the sensor arrangement is set up corresponding to each instructor a plurality of different correlating to the board-related strain distribution in the forming part, i. to record the characteristic values describing or depicting the respective operating point. The control device is then set up to determine the manipulated variable for a respective actuator under the combined evaluation of deviations for each of the different characteristic values from their respective desired values. The combined evaluation can be carried out by means of a computational combination rule, e.g. model-based. By using a plurality of characteristic values per guide position which correlate with the board-related deformation change distribution in the deformation part, the quantification of the present deformation change distribution can be carried out more accurately and detection errors can be better compensated.

According to yet another embodiment of the forming tool according to the invention, the forming tool has a board holder assembly comprising a board holder and a Gegenplatinenhalter which are relatively movable along the working direction relative to each other to clamp during forming a defined along the peripheral edge flange portion of the board between them. The sensor arrangement is then set up as the at least one characteristic of at least one of a board-related Flanscheinzug the Umformteils, a present during forming contact pressure of the board holder assembly to the flange, an existing during forming temperature of the board holder assembly, an existing during forming flow rate of the flange and a at Forming existing frictional force between board holder assembly and flange section. These different characteristic values, which in each case correlate to the board-related deformation change distribution in the deformation part, can be included in randomized grouping in a combined evaluation as mentioned above. The relationship between the characteristic values and the board position or board positioning in the forming tool 1 can be formed, for example, adaptively (model-free) or on the basis of an experimental or analytical model.

According to yet another embodiment of the forming tool according to the invention, the sensor arrangement is set up to detect the at least one characteristic value adjacent to the board-contacting element of each instructor. Thus, the characteristic values are advantageously detected close to the positions along the peripheral edge of a forming part, on which the subsequent positioning or displacement of the board is carried out in a subsequent board. Thus, the accuracy of the control for optimizing a board forming can be improved.

According to the invention, a method for optimizing (in the following optimization method) a blank forming in a forming tool is also provided. Since the advantageous effects of the optimization method according to the invention in all of his preferred embodiments listed below match those of the forming tool according to the invention, their repeated mention is omitted.

In the optimization method according to the invention, a board is inserted between two tool parts of the forming tool, which are movable relative to each other in one working direction, in order to form a forming part from the blank by forming. Prior to forming a board positioning is carried out with respect to the forming tool by the circuit board contacted at a peripheral edge of this at a plurality of contact points and is thereby positioned between the two tool parts transverse to the working direction. In addition, in the optimization method according to the invention, at least one parameter related to the forming of the board is detected.

The optimization method according to the invention is characterized in that as the at least one parameter corresponding to each contact point at least one characteristic value is detected, which correlates with a board-related strain change in the forming part, and that based on the detected characteristics, the board positioning is adjusted transversely to the working direction that Umformteilseitig a predetermined desired deformation distribution is achieved. According to one embodiment of the optimization method according to the invention, the forming tool carries out a deep-drawing process in order to achieve the transformation of the blank into the formed part. Preferably, a sheet metal blank is used as the board.

In accordance with a further embodiment of the optimization method according to the invention, the characteristic values corresponding to the respective contact points are each compared with an associated predetermined setpoint value. If a deviation of the characteristic value from the desired value is determined, control values for compensating the deviation are determined on the basis of the respective deviations and the board positioning is determined Adapted transversely to the working direction on the basis of the setting values for each contact point.

In accordance with yet another embodiment of the optimization method according to the invention, a plurality of different characteristic values correlating to the board-related deformation change in the deformation part are detected corresponding to the respective contact points, wherein the control value for a particular contact point is determined by combined evaluation of deviations from their respective desired values for the different characteristic values.

According to yet another embodiment of the optimization method according to the invention, a flange section of the board defined along the peripheral edge is clamped during forming between a board holder and a counter board holder which are movable relative to each other along the working direction and together form a board holder arrangement of the forming tool. As the at least one characteristic value is detected at least one of a platinen Flanscheinzug the Umformteils, an existing during forming contact pressure of the board holder assembly to the flange, an existing during forming temperature of the board holder assembly, existing during forming flow rate of the flange and an existing during forming friction between board holder assembly and flange.

According to yet another embodiment of the optimization method according to the invention, the at least one characteristic value is detected adjacent to each circumferential edge-side contact point.

The optimization method according to the invention is preferably carried out using a forming tool according to one, several or all of the previously described embodiments of the invention in any conceivable combination. The invention expressly extends to such embodiments, which are not given by combinations of features of explicit back references of the claims, whereby the disclosed features of the invention - as far as is technically feasible - can be combined with each other.

In the following, the invention will be described with reference to preferred embodiments and with reference to the accompanying figures.

Fig. 1 shows a schematic sectional view of a forming tool according to an embodiment of the invention.

FIG. 2 shows a schematic plan view of a lower tool part of the forming tool of FIG. 1 in a set-up state. FIG.

FIG. 3 shows a view similar to FIG. 2 with the forming tool in a first operating state.

FIG. 4 shows a view similar to FIG. 2 with the forming tool in a second operating state.

5 shows a block diagram of a control circuit for carrying out a method according to the invention for optimizing a sheet forming in the forming tool of FIG. 1.

In the following, a forming tool 1 and a method for optimizing a blank forming in the forming tool 1 will be described with reference to FIGS. 1 to 5 according to embodiments of the invention.

The forming tool 1 shown in Fig. 1 is provided for forming a circuit board PL of sheet material and in particular adapted to transform the board PL by means of a deep-drawing process to a purely exemplary as a cup-shaped deep-drawn forming part UT (see, for example, Fig. 2).

As can be seen from FIGS. 1 and 2, the forming tool 1 has a lower tool part 2 and an upper tool part 5, which are movable relative to one another in a working direction R1 running vertically in FIG. 1 and which are set up to receive the circuit board PL between each other. in order to reshape them by the process of the two tool parts 2, 5 in the working direction R1 relative to the forming part UT in a deep-drawing process. The lower tool part 2 comprises for forming the circuit board PL a deep-drawing die 3, which is fixedly mounted on a base plate (not shown), and an annular die holder 4 surrounding the deep-drawing die 3. The upper die part 5 comprises for forming the circuit board PL on a press ram a forming press (both not shown) to be mounted Tiefziehmatrize 6, on which an annular Gegenplatinenhalter 6.1 is formed as a portion of the thermoforming mold 6. The board holder 4 and the counter board holder 6.1 together form a board holder arrangement 7 of the forming tool 1.

In the forming process is effected by vertical movement of the press ram and thus the thermoforming mold 6, a relative movement of deep-drawing die 3 and thermoforming die 6 in the direction of R1, whereby the board PL is pressed by the deep-drawing die 3 in the thermoforming mold 6.

The board holder 4 is on a hydraulically vertically movable lifting table (not shown) received the forming press and process for the forming process or thermoforming process before moving the thermoforming die 6 in the working direction R1 vertically upwards, so that between the board holder 4 and the opposite thereto Gegenplatinenhalter 6.1 a parallel to the relative movement of thermoforming punch 3 and thermoforming die 6 directed relative movement is effected to clamp during forming a defined along a peripheral edge PL1 flange PL2 the board PL between board holder 4 and counter board holder 6.1 with a specific board holding force. When moving the thermoforming die 6 vertically downwards, the sinker holder 4 is then pressed vertically downwards from the counterplate holder 6.1 under a defined counterforce of the lifting table which generates the sinker holding force.

As can be seen from FIGS. 1 and 2, the forming tool 1, in order to be able to carry out positioning of the circuit board PL (board positioning) in relation to the forming tool 1, has a plurality of adjustable directors 10. 1 to 10. 8 (in FIGS generally referred to as Einweiser 10), which are arranged distributed around an outer edge portion of the board holder 4 of the lower tool part 2, by contacting the peripheral edge PL1 of the board PL to position these transversely to the working direction R1 between the two tool parts 2, 5 or possibly. to relocate.

The instructors 10 each have an actuator 1 1 (eg, a servomotor with a converter transmission from rotational movement to linear motion) via which a platinum contacting element 12 of the respective instructor 10 for positioning the circuit board PL transversely to the working direction R1, ie in each case in the figures 1 and 2 horizontally extending transverse directions R2, R3, is movable.

Such as. 2, the forming tool 1 also has a sensor arrangement 20 with a plurality of sensors 20.1 to 20.4 distributed around the outer edge section of the sinker holder 4 of the lower tool part 2 (four sensors in the present embodiment). The sensor arrangement 20 serves to detect at least one parameter associated with the deformation of the circuit board PL.

More precisely, in the present embodiment, the circuit board PL is formed purely by way of example rectangular and two Einweiser 10 are arranged on each long side and on each short side of a rectangular forming area of the lower tool part 2 for the board PL. On each long side and on each short side of the rectangular forming area for the circuit board PL, one of the sensors 20.1 to 20.4 is arranged in each case centrally between the two board-side instructors 10, so that in each case two sensors 20.1, 20.3 are located substantially opposite one another on the short axis and respectively two sensors 20.2, 20.4 are located opposite each other substantially on the long axis. In the present embodiment, the sensors 20.1 to 20.4 are each provided as a displacement measuring sensor, e.g. formed on inductive, capacitive or optical function base.

By means of the sensors 20.1 to 20.4 of the sensor arrangement, on each long side and each short side of the rectangular forming region of the lower tool part 2, a flannel pull al.n to a4.n (with n =.) Arising from the deformation of the circuit board PL to the forming part UT at the flange section PL2 1, 2 or 3 according to the described embodiment) can be detected as a measure of length. More specifically, in order to detect, as corresponding to each instructor 10, the at least one parameter associated with the forming of the board PL, as an actual characteristic value (here in the form of the flannel sign al .n to a4.n), for each pair Platinenseitpezifische Einweiser 10.1, 10.2; 10.3, 10.4; 10.5, 10.6 and 10.7, 10.8, a common flange slip a1.n, a2.n, a3.n or a4.n is recorded as the characteristic value.

As already explained above, the optimum working point during deep drawing is basically defined by the most uniform possible board-related strain change in the deep-drawn part or the shaped part UT, the transverse position of the board PL (in the transverse directions R2, R3) in the forming tool 1 having a significant influence on the strain distribution. As In addition, already explained at the outset, the Flanscheinzug al .n to a4.n formed by the transformation of the board PL to the Umformteil UT at the flange PL2 can as a meaningful indicator or characteristic value (code) for maintaining the optimum operating point, ie a possible constant strain change distribution can be used.

Thus, the sensor assembly 20 is arranged to have the at least one parameter associated with the forming of the board PL corresponding to each one of the referrers 10, i. adjacent to the board contacting element 12 of each instructor 10, to detect at least one characteristic value (here in the form of the flannel sign a1.n to a4.n), which correlates with the board-related shape change distribution in the forming part UT.

As can be seen by additional reference to FIG. 5, the forming tool 1 also has a control device 30, which is connected via electrical lines, not shown, to the respective actuators 11 of the instructor 10 and to the sensors 20.1 to 20.4 of the sensor arrangement 20. The control device 30 comprises a memory unit 31 (with, for example, a ROM, a RAM, etc.) for storing predetermined values, a difference-forming unit 32 for determining a control deviation and a computer unit 33 for determining control variables for compensating the control deviation.

More precisely, the control device 30 is set up to compare the flannel signatures al.n to a4.n detected corresponding to the respective referrers 10 as characteristic values in the subtractor unit 32, in each case with an associated predetermined setpoint value a1.s to a4.s, which is stored in the memory unit 31 is deposited.

The difference-forming unit 32 is set up to determine a deviation (control deviation) of the flannel sign (characteristic value) al.n to a4.n from the setpoint value al.s to a4.s and to feed it to the computer unit 33. The computer unit 33 is set up on the basis of the respective deviations to determine respective manipulated values b1 to b4 (as manipulated variables) for the actuators 1 1 of the referrers 10 for compensating or minimizing the deviation and the actuators 1 1 on the basis of the manipulated values b1 to b4 to drive in the transverse direction R2 and R3 method of Platinenkontaktierungselemente 12.

The setpoint values al.s to a4.s can be derived, for example, during the incorporation of the forming tool 1 from a forming part UT evaluated as a "good part", as shown in FIG. In other words, the setpoint values al.s to a4.s correspond, for example, to the flan passes a1 .1 to a4.1, which, after their detection by the sensor arrangement 20, are stored in the memory device. unit 31 are stored, as indicated by the dashed arrow connection in Fig. 5, and which correspond to a desired platinum-related deformation distribution or board-related desired deformation distribution in the deep-drawn part or forming part UT.

During operation of the forming tool 1, with the configuration described above, an automatically proceeding method for optimizing (in the following optimization method) the blank forming in the forming tool 1 can be carried out.

According to the optimization method, in the incorporation of the forming tool 1 as shown in FIG. 2, a circuit board PL is introduced between the two tool parts 2, 5 of the forming tool 1 in order to form a forming part UT from the blank PL by forming.

Prior to forming, the board positioning is performed with respect to the forming tool 1 by contacting the board PL at its peripheral edge PL1 at a plurality of contact points at which the board contacting elements 12 of the referers 10 are located by the board contacting elements 12 and thereby between the two tool parts 2, 5 transversely to the working direction R1 (in the transverse direction R2, R3) is uniquely positioned.

The at least one associated with the deformation of the board PL parameter is then detected at the Umformteil UT. More precisely, as the at least one parameter corresponding to each contact point, the flange passes a1 .1 to a4.1 are detected as characteristic values which correlate with the board-related deformation change distribution in the forming part UT.

After evaluation of the flannels a1 .1 to a4.1 corresponding to the respective contact points and, if applicable, other visual and metrological examinations, the reshaping part UT shown in FIG. 2 is hereby classified by way of example as a "good part". Therefore, the flange passes a1 .1 to a4.1 detected corresponding to the respective contact points are stored in the memory unit 31 as desired values a1 .s to a4.s.

According to the optimization method, a further board PL is introduced between the two tool parts 2, 5 of the forming tool 1 in a subsequent production operation of the forming tool 1 as shown in FIG. 3 in order to form a forming part UT from the blank PL by forming. Prior to forming the board positioning is again carried out with respect to the forming tool 1 by the board PL contacted at its peripheral edge PL1 at the contact points where the Platinenkontaktierungselemente 12 of the Einweiser 10 are arranged by the board contacting elements 12 and thereby between the two Tool parts 2, 5 transversely to the working direction R1 (in the transverse direction R2, R3) is uniquely positioned.

At the forming part UT, corresponding to each contact point, the flange passes a1.2 to a4.2 are detected again as characteristic values which correlate with the board-related strain change distribution in the forming part UT. Then, the flannel trains a1.2 to a4.2 detected corresponding to the respective contact points are each compared with their associated predetermined setpoint value al.s to a4.s. In this case, the setpoints al .s to a4.s correspond to the flannel displays a1 .1 to a4.1 determined during incorporation for the "good part".

Within the framework of the comparison in the difference-forming unit 32, a deviation from the associated desired value a1.s to a4.s is determined for each flannel chart a1 .2 to a4.2. As can be seen from Fig. 3, e.g. As a result of process fluctuations such as another sheet metal charge or other lubrication conditions for the circuit board PL, the flange passes a1.2 to a4.2 change compared to the desired values a1.s to a4.s, ie have a deviation that is greater than zero in magnitude.

Specifically, the flannschein a1.2 and a2.2 have each reduced by a certain length measure. On the other hand, the Flanscheinzug a3.2 has increased by purely exemplary the same length measure, as the Flanscheinzug a1 .2 has reduced. In the same way, the Flanscheinzug a4.2 has increased by purely exemplary the same length measure, as the Flanscheinzug a2.2 has reduced. In the present embodiment, the Umformteil UT is classified as "Nichtgutteil" because of the extent of the change or the amount of magnitude of the deviation.

On the basis of the particular respective deviations, respective manipulated variables b1 to b4 (as manipulated variables) for the actuators 11 of the instructors 10 for compensating or minimizing the deviation are determined in the computer unit 33. These setting values b1 to b4 can, but do not necessarily have to, respectively represent the negative value of the respectively associated deviation.

As shown in Fig. 4, the actuators 1 1 are each driven on the basis of the control values b1 to b4 for transversely R2 and R3 method of Platinungskontaktierungselemente 12 to to adjust the board positioning transversely to the working direction R1 on the basis of the setting values b1 to b4 for each contact point on the peripheral edge PL1. In other words, as shown in FIG. 4, the board positioning is moved in the direction of too large Flanscheinzüge a3.2, a4.2, there to increase the flange area PL2 and thus increase a contact pressure between board PL and board holder assembly 7.

In detail, the actuators 1 1 of the referrers 10.1, 10.2 are controlled on the one long side both with the control value b1, the actuators 1 1 of the Einweiser 10.5, 10.6 on the other long side both with the control value b3 (b3 = -b1), are the actuators 1 1 of the referrers 10.3, 10.4 on the one short side both driven with the control value b2 and the actuators 1 1 of the Einweiser 10.7, 10.8 on the other short side both with the control value b4 (b4 = -b2) driven.

Before the adjustment of the referrers 10 or thereafter, a board PL between the two tool parts 2, 5 of the forming tool 1 is again introduced and positioned by board positioning (by the referrers 10). After the adjustment of the referers 10 and the board positioning, the board PL is reshaped and again the detection steps and compensation steps for the sheet passes al.n to a4.n (characteristic values) already described with reference to FIGS. 3 and 4 are carried out. This process is repeated as part of the scheme until, as shown in Fig. 4, the respective flan passes a1.3 to a4.3 have a minimum deviation from their respective target values al .s to a4.s (substantially coincident therewith), so the forming part UT can be classified as a "good part".

Thus, based on the detected Flanscheinzüge al .n to a4.n (characteristic values), the board positioning transversely to the working direction R1 adapted so that the forming part side of the predetermined target deformation distribution is achieved. As a result, therefore, the control device 30 is set up, the actuators 1 1 of the Einweiser 10 on the basis of the detected Flanscheinzüge al .n to a4.n (characteristic values) to control the process of Platinenkontaktierungselemente 12 so that umformteilseitig the predetermined target strain distribution is achieved.

According to a modified embodiment of the optimization method, characteristic values other than the flannel signatures al.n to a4.n can also be detected as characteristic values correlating with the board-related deformation change distribution in the deformation part UT. At least one of the board-related flange slip al.n to a4.n of the Umformteils UT, a present during forming contact pressure of the board holder assembly 7 to the flange portion PL2, one during forming is preferred as the at least one characteristic value per contact point existing temperature of the board holder assembly 7, an existing during forming flow rate of the flange portion PL2 and an existing during forming friction between board holder assembly 7 and flange PL2. The relationship between the characteristic values and the board position or board positioning in the forming tool 1 can be formed, for example, adaptively (model-free) or on the basis of an experimental or analytical model.

To implement the modified optimization method, the sensor arrangement 20 is then set up to detect the at least one characteristic of the board-related flange slip al .n to a4.n of the deformation part UT, the contact pressure of the board holder arrangement 7 to the flange section PL2, the temperature of the board holder arrangement 7 , the flow velocity of the flange portion PL2 and the frictional force between the board holder assembly 7 and the flange portion PL2. For this purpose, the sensor arrangement 20 may comprise suitable sensors, e.g. Distance measuring sensors, strain gauges and / or temperature sensors, etc. have.

According to a further modified embodiment of the optimization method, corresponding to the respective contact points at the peripheral edge PL1 of a board PL or corresponding to the respective board contacting elements 12, a plurality of different values correlating to the board-related deformation change in the forming part UT can be detected. As these characteristics, in particular, the board-related Flanscheinzug al .n to a4.n of the Umformteils UT, the contact pressure of the board holder assembly 7 to flange PL2, the temperature of the board holder assembly 7, the flow rate of the flange portion PL2 and / or the frictional force between board holder assembly 7 and flange PL2 into consideration.

According to this further modified embodiment of the optimization method, the setting value b1 to b4 for a respective contact point is then determined by combined evaluation (for example by means of a computational combination rule, which is, for example, model-based) of deviations for each of the different characteristic values from their respective nominal values.

In order to realize this further modified optimization method, the sensor arrangement 20 is then set up to detect, corresponding to each instructor 10, a plurality of different characteristic values correlating with the board-related deformation change distribution in the deformation part UT. In particular, the sensor arrangement 20 is set up, the board-related flange slip al.n to a4.n of the Umformteils UT, the contact pressure of the board holder assembly. 7 to the flange portion PL2, the temperature of the board holder assembly 7, the flow velocity of the flange portion PL2, and / or the frictional force between the board holder assembly 7 and the flange portion PL2. For this purpose, the sensor arrangement 20 may comprise suitable sensors, such as displacement measuring sensors, strain gauges and / or temperature sensors, etc.

In addition, the control device 30 is then set up to determine the control value for a respective actuator 1 1 under combined evaluation (eg by means of a computational combination rule, which is model-based, for example) for deviations from their respective desired values for the different characteristic values.

LIST OF REFERENCE NUMBERS

1 forming tool

tool part

Ironing punch

PCB holder

tool part

6 thermoforming die

6.1 Counterplate holder

7 board holder assembly

10 referrers (general)

10.1 -10.8 Einweiser

1 1 actuator

12 board-contacting element

20 sensor arrangement

20.1 -20.4 sensors

30 control device

31 storage unit

32 differential unit

33 computer unit

a1.n-a4.n Actual characteristic value (Flanscheinzug)

a1.1 -a4.1 Flannel train

a1.2-a4.2 Flanscheinzug

a1.3-a4.3 flannel train

a1.s-a4.s setpoint (for flannel pull)

b1-b4 control values

PL board

PL1 peripheral edge

PL2 flange section

UT forming part

R1 working direction

R2, R3 transverse direction

Claims

claims

1 . Forming tool (1) with:

two tool parts (2, 5), which are movable relative to one another in one working direction (R1), for receiving and forming a blank (PL) in between, in order to form a shaped part (UT) therefrom,

a plurality of adjustable Indirect (10) for contacting a Umfangsran- (PL1) of the board (PL) to position them transversely to the working direction (R1) between the two tool parts (2, 5), the Einweiser (10) respectively an actuator (1 1), via which a Platinenkontaktierungselement (12) of the respective Einweisers (10) for positioning the board (PL) transversely to the working direction (R1) is movable, and

a sensor arrangement (20) for detecting at least one parameter associated with the forming of the board (PL),

characterized in that the sensor arrangement (20) is set up as the at least one parameter corresponding to each instructor (10) to detect at least one characteristic value (al.n - a4.n) which correlates with a board-related strain change in the forming part (UT) in that a control device (30) is provided which is connected to the respective actuators (1 1) of the instructors (10) and the sensor arrangement (20) and which is set up, the actuators (1 1) on the basis of the detected characteristic values ( a1 .n to a4.n) for controlling the platinum-contacting elements (12) in such a way that a predetermined desired deformation distribution is achieved on the part-forming side.

2. Forming tool (1) according to claim 1, wherein the control device (30) is set up, the characteristic values corresponding to the respective referers (10) (al.n-a4.n) each having an associated predetermined setpoint value (al. a4.s) in each case to determine a deviation of the characteristic value (al.n to a4.n) from the nominal value (a1 .s-a4.s), based on the respective deviations, respective manipulated values (b1-b4) for the actuators (1 1) to compensate for the deviation and to control the actuators (1 1) each based on the control values (b1 - b4) for moving the Platinenkontaktie- elements (12).

3. forming tool (1) according to claim 2, wherein the sensor arrangement (20) is arranged corresponding to each instructor (10) a plurality of different to the board-related strain change distribution in the forming part (UT) correlating characteristic values (al to a4.n), and wherein the control device (30) is set up to determine the control value (b1-b4) for a respective actuator (11) under combined evaluation of the different characteristic values (al .n to a4. n) in each case specific deviations from their respective desired values (a1.s-a4.s).

4. forming tool (1) according to any one of claims 1-3, wherein the forming tool (1) comprises a board holder assembly (7) comprising a board holder (4) and a Gegenplatinenhalter (6.1), which parallel to the tool parts (2, 5 ) are movable relative to each other in order to clamp during clamping along the peripheral edge (PL1) defined flange portion (PL2) of the board (PL) between each other, and wherein the sensor arrangement (20) is arranged to detect the at least one characteristic of at least one of a board-related flange (al .n to a4.n) of the Umformteils (UT), a contact pressure of the board holder assembly (7) to the flange portion (PL2), a temperature of the board holder assembly (7), a flow velocity of the flange portion (PL2) and a frictional force between Board holder assembly (7) and flange portion (PL2).

5. Forming tool (1) according to one of claims 1 to 4, wherein the sensor arrangement (20) is set up to have the at least one characteristic (al.n to a4.n) adjacent to the planar contact element (12) of each instructor (10). capture.

6. A method for optimizing a board forming in a forming tool (1), wherein:

a board (PL) is inserted between two tool parts (2, 5) of the forming tool (1) which are movable relative to one another in a working direction (R1) in order to form a forming part (UT) from the blank (PL) by forming,

before the forming a board positioning with respect to the forming tool (1) is performed by the board (PL) at a peripheral edge (PL1) contacted at a plurality of contact points and thereby between the two tool parts (2, 5) transversely to the working direction ( R1) is positioned, and

at least one parameter associated with the forming of the board (PL) is detected,

characterized in that as the at least one parameter corresponding to each contact point at least one characteristic value (a1 .n - a4.n) is detected, which correlates with a board-related strain change in the Umformteil (UT), and that on the basis of the detected characteristics (al. n - a4.n) the board positioning transverse to Working direction (R1) is adjusted so that Umformteilseitig a predetermined desired deformation distribution is achieved.

7. The method as claimed in claim 6, wherein the characteristic values (ai.n-a4.n) detected corresponding to the respective contact points are each compared with an associated predetermined desired value (al.s-a4.s), in each case a deviation of the characteristic value (ai .n

a4.n) is determined from the desired value (a1 .s-a4.s), based on the respective deviations, setting values (b1-b4) are determined for compensating the deviation and the board positioning transversely to the working direction (R1) is based on the manipulated values ( b1 - b4) for each contact point.

8. Method according to claim 7, wherein corresponding to the respective contact points a plurality of different characteristic values (a1.n-a4.n) correlating with the board-related deformation change distribution in the deformation part (UT) are detected, and wherein the control value (b1-b4) for a respective contact point is determined by a combined evaluation of for the different characteristic values (ai .n - a4.n) respectively determined deviations from their respective setpoint values (al .s - a4.s).

9. The method according to any one of claims 6-8, wherein during forming a along the peripheral edge (PL1) defined flange (PL2) of the board (PL) is clamped between a board holder (4) and a counter-board holder (6.1), which parallel to the tool parts (2, 5) relative to each other are relatively movable and together form a Platinenhaiteranordnung (7) of the forming tool (1), and wherein at least one of at least one characteristic value is detected by a board-related Flanscheinzug (ai .n - a4.n) the Umformteils (UT), a contact pressure of the Platinenhaiteranordnung (7) to the flange portion (PL2), a temperature of the Plathahaiteranordnung (7), a flow velocity of the flange portion (PL2) and a frictional force between the PCB holder assembly (7) and flange portion (PL2).

10. The method according to any one of claims 6-9, wherein the at least one characteristic value (ai .n

- a4.n) adjacent to each peripheral edge contact point is detected.